Typewriting machine



Nov. 23, 1937; s. KHALIL TYPEWRIT'ING MACHINE Filed April 6, 1936 INVENTOR Stayed mau BY ATTORNEYS Patented Nov. 23, 1937 UNITED STATES TYPEWRITING MACHINE Seyed Khalil, New York, N. Y., assignor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Application April 6, 1936, Serial No. 73,023

8 Claims.

This invention relates to new and useful improvements in typewriting machines generally, although more particularly to type actions therefor.

Among the several objects of the invention are to provide a type action in which the noise of impact is materially reduced; to provide a type bar which is bodily raised and moved rearwardly to printing position; and to provide a toggle in the action which imparts an accelerated speed travel to the typebar until the toggle becomes locked, and a decelerated speed travel to the type bar after the toggle is broken and immediately prior to printing.

With these and other objects in view which will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawing.

In the drawing:

Figure 1 is an elevation of a type action constructed inaccordance with my invention, the parts being shown in difierent positions during the operation, and

Figure 2 is a detail elevation showing the type bar, the supporting lever, and the toggle links in difierent positions during the operation.

In the accompanying drawing, I have shown a vertically shiftable platen 5 and a type action which includes a finger key lever. B, the latter being disposed below and in front ofthe platen and pivoted intermediate its ends as at l to the machine frame.

A supporting hook-lever 8 is disposed interme- I diate the key lever 6 and the platen. This hooklever includes a forwardly and upwardly extending beak 9 and a rearwardly and upwardly extending shank ID, the latter being pivoted inter-.

. tending arms l4, l5 and a forwardly and downof the lever I3 is below the pivot H of the hook-f lever, and that the lever arms M, l5 extend above the pivot I I.

The beak 9 and the arm. 14 are connected by a toggle which consists of a relatively short link l9 anda relatively long link 20. These links are pivotally connected as at 2|, the forward end of the short link i9 being pivoted as at 22 to the upper end of the beak 9, and the rear end of the long link 2|! being pivoted as at 23 to the upper end of the lever arm M.

A type bar M which is normally inclined upwardly and rearwardly, is pivoted intermediate its ends as at 25 to the short link l9, and carries at its upper end a type head 2.6 having upper and lower type characters 25 and 26. A link 21 which is normally disposed in parallelism with the link I9, is pivoted at one end to the beak 9 below the pivot 22 as at 21"- and at its other end as at 28 to the lower end of the type bar 24. Thus, it will be seen that the lower portion of the type bar 24 constitutes a lever arm 24 which together with the link Mi,v forms a toggle connection between the type bar and the supporting hook-lever 8. It will be noted that thedistance between the pivots 2! and 28 of the link 21 is less than the distance between the pivots 22 and 25 of the short toggle link l9.

The hook-lever 8 normallyrests on a cushion stop 29 which is secured to the machine frame, and a return spring 30 is connected to the forward arm of the key lever 6 and is anchored on a cross rod 3! also mounted on the machine frame.

In operation, upon depression of the key lever 6, the arm of the intermediate lever I 3 will be swung to the right as viewed in Figure l, and the toggle links i9, 20 will swing the supporting lever 8 upwardly until the links I9, 20 are in locked relation, as shown by the dotted lines in Fig. 1. During the movements of these parts, the type bar 24 will be bodily'raised and moved rearwardly until said bar is in a substantially horizontal position as shown by the dotted lines in Fig. l, and the rate of speed travel of the type bar will be accelerated during said movement. The momentum of the type bar attained during said accelerated speed travel thereof, will suffice for. the type bar to break the toggle links I9, 20 and move at a decelerated rate of speed from the single line position shown in Fig. 2 to its printing position as shown by full lines in said figure, and thereby insure a quiet impact against the platen. Upon release of the key lever B by the operator, the parts will be returned immediately by the spring 30 to their normal rest positions as variously changed and modified without departingfrom the spirit and scope of my invention.

I claim:

1. In a type action, a normally upwardly extending type bar, a key lever, and connections between the type bar and the key lever for raising and moving the type bar rearwardly into a horizontal printing position, said connections including a supporting lever, an intermediate lever, and a toggle connecting the supporting lever and the intermediate lever and having pivotal connection with the type bar.

2. In a type action, a normally upwardly ex-v tending type bar, a key. lever, and connections between the type bar and the key lever for raising and moving the type bar rearwardly into a horizontal printing position, said connections including a supporting lever, an intermediate lever, and a toggle connecting the supporting lever and the intermediate lever and having pivotal connection with the type bar, the upward and rearward movement of the supporting lever eil'ecting the locking of the toggle and the momentum of the type bar eflfectlng a breaking or the toggle and a continued movement of the type bar to printing position.

3. In a type action, a normally upwardly ex- 7 toggle connecting the supporting lever and the intermediate lever and having pivotal connection with the type bar, and a link connecting the supporting lever and the type bar, the upward and rearward movement of the supporting lever eitecting the locking oi, the toggle and the momentum of the type bar eiiecting a breaking of the toggle and a continued upward and rearward movement connected to the key lever, a toggle link connection between the supporting lever and the intermediate lever, and a type-bar having pivotal connections withthe toggle and with the supporting lever. I

5. In a type action, the combination with akey lever, of a supporting lever, an intermediate lever connected to the key-lever, a toggle link connection between the supporting lever and the intermediate lever, a type bar pivoted intermediate its ends to one ofthe toggle links, and a link connecting the type bar, and the'supporting lever,

6. In a type action, the combination with a key lever, oi. a supporting lever iulcrume'd to swing upwardly and rearwardly, a vertical intermediate lever connected to the key lever to swing rearwardly upon depression of said key lever, a toggle link connection between the intermediate lever and the forward end of the supporting lever and adapted to assume a locked position when the key-lever reaches the lower end of its depression stroke, and a type bar having pivotal connections with the toggle and with the forward end of the supporting lever. I

'I. In a type action, a type bar bodily movable upwardly and rearwardly, a key lever, and connectiogs between the type bar and the key lever including a supporting lever, an intermediate lever, a connection between the intermediate lever and the key lever, a toggle connection between the supporting lever and the intermediate lever,

said type bar being pivotally supported on the toggle, and a link connecting the type bar' and the supporting lever, said connections accelerating the speed travel of the type bar until the toggle is locked and decelerating the speed travel of the type bar after the toggle has been broken by thecontinued movement of the type bar du to its momentum.

8. A type action for typewriting machines comprising a platen, a key lever disposed below the platen, a hook-shaped supporting lever disposed intermediate the platen and the key lever and ineludinga forwardly and upwardly extending beak anupwardly and rearwardly extending shank, the shank being fulcrumed intermediate its ends to form a resultant short lever arm, "a, vertically disposed intermediate lever fulcrumed intermediate its ends between the supporting lever and the key lever, said intermediate lever having two at its upper end and a forwardly and downwardly extending arm at its lower end, a link connecting the downwardly extending arm of the intermediate lever and the-rear end of the A key levfer', a link connecting one of the upper arms of the intermediate lever and the short arm of the supporting lever, a toggle connection between the beak of the supporting lever and the other upper arm or the intermediate lever, said toggle comprising pivotally connected short and long links, the short link being pivoted to said beak and the long being pivoted to said upper arm, an upwardlyiand rearwardly inclined type bar pivoted intermediate its ends to the short link of the toggle,-and a link connecting said beak and the lower oi the type bar, the distance between the pivots oi the last mentioned link being less than the distance between the fulcrum pivot of the short toggle link and the pivot between said short and the type bar.

SEYED KHALIL. 

